Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	$ 13,260
Stockholders' equity attributable to parent, ending balance	11,004
Foreign currency translation [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	(489)	$ (400)
Other comprehensive (loss)/income before reclassifications	(59)	(42)
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	0	(44)
Net current-period other comprehensive (loss)/income	(59)	2
Stockholders' equity attributable to parent, ending balance	(548)	(398)
Derivative instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	11	9
Other comprehensive (loss)/income before reclassifications	(1)	7
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	2	1
Net current-period other comprehensive (loss)/income	(3)	6
Stockholders' equity attributable to parent, ending balance	8	15
Defined pension and post-retirement benefit costs [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	(1,708)	(1,968)
Other comprehensive (loss)/income before reclassifications	2	1
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	(4)	(39)
Net current-period other comprehensive (loss)/income	6	40
Stockholders' equity attributable to parent, ending balance	(1,702)	(1,928)
Total [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity attributable to parent, beginning balance	(2,186)	(2,359)
Other comprehensive (loss)/income before reclassifications	(58)	(34)
Amounts reclassified from accumulated other comprehensive income/(loss) (net of income tax)	(2)	(82)
Net current-period other comprehensive (loss)/income	(56)	48
Stockholders' equity attributable to parent, ending balance	$ (2,242)	$ (2,311)