Subsequent Events	12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	23. Subsequent Events On January 19, 2021, the Company completed the U.K. Sale pursuant to a Share Purchase Agreement in which it sold all of the securities of AHC-WW Jersey Limited, a private limited liability company incorporated in Jersey and a subsidiary of the Company, which constitutes the entirety of our U.K. business operations. The U.K. Sale resulted in approximately $1,525 million of gross proceeds before deducting the settlement of existing foreign currency hedging liabilities of $85 million based on the current GBP to USD exchange rate, cash retained by the buyer of approximately $75 million and transaction costs of $16 million. The Company used the net proceeds of $1,425 million (or $1,350 million, net of cash retained by the buyer) to repay in full the outstanding balances of its TLA Facility of $312 million and its Tranche B-4 Facility of $768 million of the Amended and Restated Credit Agreement and added $345 million of cash to the balance sheet. In addition to reducing its indebtedness, the U.K. Sale allows the Company to focus on U.S. operations. As a result of the U.K. Sale, the Company reported, for all periods presented, results of operations and cash flows of the U.K. operations as discontinued operations in the accompanying financial statements. On January 29, 2021, the Company issued conditional notices of full redemption proving for the redemption in full of $650 million of 5.265% Senior Notes and $390 million of 6.500% Senior Notes to the holders of such notes. The redemption of this $1,040 million of additional debt, along with the payment of breakage costs of $6 million and estimated transaction costs of $9 million, is expected to be completed in early March 2021 and to be funded from cash from the balance sheet of $430 million and proceeds from a new senior secured credit facility of $625 million. The Company expects to enter into a new term loan and revolver as part of a five-year senior secured credit facility.

Subsequent Events

12 Months Ended

Dec. 31, 2020

23. Subsequent Events

On January 19, 2021, the Company completed the U.K. Sale pursuant to a Share Purchase Agreement in which it sold all of the securities of AHC-WW Jersey Limited, a private limited liability company incorporated in Jersey and a subsidiary of the Company, which constitutes the entirety of our U.K. business operations. The U.K. Sale resulted in approximately $1,525 million of gross proceeds before deducting the settlement of existing foreign currency hedging liabilities of $85 million based on the current GBP to USD exchange rate, cash retained by the buyer of approximately $75 million and transaction costs of $16 million. The Company used the net proceeds of $1,425 million (or $1,350 million, net of cash retained by the buyer) to repay in full the outstanding balances of its TLA Facility of $312 million and its Tranche B-4 Facility of $768 million of the Amended and Restated Credit Agreement and added $345 million of cash to the balance sheet. In addition to reducing its indebtedness, the U.K. Sale allows the Company to focus on U.S. operations. As a result of the U.K. Sale, the Company reported, for all periods presented, results of operations and cash flows of the U.K. operations as discontinued operations in the accompanying financial statements.

On January 29, 2021, the Company issued conditional notices of full redemption proving for the redemption in full of $650 million of 5.265% Senior Notes and $390 million of 6.500% Senior Notes to the holders of such notes. The redemption of this $1,040 million of additional debt, along with the payment of breakage costs of $6 million and estimated transaction costs of $9 million, is expected to be completed in early March 2021 and to be funded from cash from the balance sheet of $430 million and proceeds from a new senior secured credit facility of $625 million. The Company expects to enter into a new term loan and revolver as part of a five-year senior secured credit facility.