Debt and Borrowing Arrangements - Interest and Other Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt Disclosure [Abstract]
Interest expense, debt	$ 98	$ 110
Loss on debt extinguishment and related expenses	137	0
Loss related to interest rate swaps	0	103
Other (income)/expense, net	(17)	(23)
Interest and other expense, net	$ 218	$ 190