Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Operating Lease Costs and Supplemental Cash Flow Information

The following table summarizes the components of total operating lease costs, net and provides supplemental cash flow information related to leases:

Year Ended December 31,	2020		2019
	(in millions)
Operating lease cost	$	127	$	136
Variable lease cost	59		63
Short-term lease cost	—		4
Sublease income(1)	(54)		(60)
Total operating lease costs, net	$	132	$	143
Supplemental disclosure of cash flow information:
Cash paid for amounts included in the measurement of operating lease liabilities	$	135	$	126
ROU assets recognized for new operating lease liabilities	24		132

(1)We have entered into agreements to sublease certain office space, including agreements to receive rental income from our affiliates for rent. As owner or lessee of the properties, we have entered into agreements with these affiliates to charge them rent based on the office space utilized by their employees during the period. See Note 23, "Related Party Transactions," for further disclosure.

Operating Lease ROU Assets and Liabilities

The following table presents information about our operating lease ROU assets and liabilities:

At December 31,	2020			2019
	(dollars are in millions)
Operating lease ROU assets(1)	$	527		$	719
Operating lease liabilities	625			783
Weighted-average remaining lease term	6.8 years			7.2 years
Weighted-average discount rate	3.0		%	3.1		%

(1)Reported net of level lease adjustments and accumulated impairment losses.

Maturity Analysis of Operating Lease Liabilities

The following table presents a maturity analysis of our operating lease liabilities at December 31, 2020:

Year Ending December 31,
	(in millions)
2021	$	121
2022	122
2023	115
2024	111
2025	74
Thereafter	167
Total future operating lease payments	710
Less - imputed interest	(85)
Total operating lease liabilities	$	625