Leases (Tables)

12 Months Ended

Dec. 31, 2019

Lessee, Lease, Description [Line Items]

Schedule of Lease Assets and Liabilities [Table Text Block]

The table below presents the lease-related assets and liabilities recorded on our consolidated balance sheets as of December 31, 2019 and 2018 (in millions):



		As of December 31,
		2019			2018
Assets	Classification on Balance Sheet
Operating lease assets	Operating lease assets	$	912		$	1,056
Finance lease assets	Property and equipment, net	171			181
Total lease assets		$	1,083		$	1,237

Liabilities	Classification on Balance Sheet
Current:
Operating lease liabilities	Current operating lease liabilities	$	128		$	133
Finance lease liabilities	Current maturities of long-term debt and finance lease obligations	31			18
Long-term:
Operating lease liabilities	Long-term operating lease liabilities	690			798
Finance lease liabilities	Long-term debt and finance lease obligations	58			89
Total lease liabilities		$	907		$	1,038

		As of December 31,
		2019			2018
Weighted average remaining lease term (in years)
Operating leases		11			11
Finance leases		3			4
Weighted average discount rate
Operating leases		5.95		%	5.95		%
Finance leases		4.75		%	4.73		%

Lease, Cost [Table Text Block]

The table below presents certain information related to our lease costs during the years ended December 31, 2019, 2018, and 2017 (in millions):



	2019			2018			2017
Operating lease cost	$	180		$	185		$	180
Short-term lease cost	2			2			2
Finance lease cost:
Amortization of assets	9			10			10
Interest on lease liabilities	3			3			4
Variable lease cost	391			379			358
Sublease income	(19		)	(15		)	(14		)
Total net lease cost	$	566		$	564		$	540

Schedule of Leases, Supplemental Cash Flows [Table Text Block]

The table below presents supplemental cash flow information related to leases during the years ended December 31, 2019, 2018, and 2017 (in millions):



	2019		2018		2017
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases	$	136	$	151	$	150
Operating cash flows for finance leases	5		5		6
Financing cash flows for finance leases	17		17		16

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

The table below presents scheduled future minimum lease payments for operating and finance leases recorded on our consolidated balance sheets, as of December 31, 2019 (in millions):



	As of December 31, 2019
	Operating Leases			Finance Leases
2020	$	128		$	35
2021	122			39
2022	114			9
2023	104			9
2024	95			5
Thereafter	565			—
Total minimum lease payments	1,128			97
Less: amount of lease payment representing interest	(310		)	(8		)
Present value of future minimum lease payment	818			89
Less: current obligations under leases	(128		)	(31		)
Long-term lease obligations	$	690		$	58