Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax liabilities:
Goodwill and intangible assets	$ (603)	$ (598)
Property, plant and equipment	(281)	(303)
Right-of-use assets	(131)	(135)
Deferred withholding tax	(95)	(207)
Other	(52)	(46)
Total deferred tax liabilities	(1,162)	(1,289)
Deferred tax assets:
Pension and other retiree benefits	404	381
Tax credits and tax loss carryforwards	42	93
Lease liabilities	144	152
Accrued liabilities	250	221
Stock-based compensation	73	88
Other	125	83
Total deferred tax assets	1,038	1,018
Valuation Allowance	(11)	(59)
Net deferred tax assets	1,027	959
Assets:
Deferred income taxes	291	177
Liabilities:
Deferred income taxes	(426)	(507)
Net deferred income taxes	$ (135)	$ (330)