pre_text: AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENT(Tabular amounts in millions, unless otherwise disclosed) 11. ASSET RETIREMENT OBLIGATIONS The changes in the carrying amount of the Company’s asset retirement obligations were as follows: (1) Revisions in estimates include decreases to the liability of $6.7 million and $49.4 million related to foreign currency translation for the years ended December 31, 2019 and 2018, respectively. As of December 31, 2019, the estimated undiscounted future cash outlay for asset retirement obligations was $3.2 billion.
table: 2019 2018
table: Beginning balance as of January 1, $1,210.0 $1,175.3
table: Additions 61.8 39.6
table: Accretion expense 81.6 83.6
table: Revisions in estimates (1) 56.8 (81.5)
table: Settlements (26.1) (7.0)
table: Balance as of December 31, $1,384.1 $1,210.0
question: Analyse this data from a financial earnings document. What is the sum of additions and accretion expense in 2018?