Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Supplemental Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and cash equivalents	$ 334	$ 313
Restricted cash	55	51
Receivables, net of allowance for credit losses of $61 and $36, respectively	624	755
Inventories	248	244
Prepaid expenses, deposits and other current assets	235	252
Property and equipment, net	474	500
Operating lease right-of-use assets	98	105
Goodwill	3,162	3,280
Intangible assets, net	1,429	1,516
Software, net	248	258
Total assets	7,458	7,809
Liabilities and Equity [Abstract]
Debt, Current	45	45
Long-term Debt and Lease Obligation	8,620	8,680
Operating lease liabilities	81	88
Stockholders' Equity Attributable to Parent	(2,466)	(2,212)
Liabilities and Equity, Total	7,458	7,809
Non-current restricted cash	$ 11	$ 11