Debt and Borrowing Arrangements - Interest and Other Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt Disclosure [Abstract]
Interest expense, debt	$ 108	$ 127	$ 218	$ 250
Loss related to interest rate swaps	0	0	103	0
Other (income)/expense, net	(23)	(26)	(46)	(69)
Interest and other expense, net	$ 85	$ 101	$ 275	$ 181