Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts of $13 and $20, respectively	$ 13	$ 20
Other Current Assets, Allowance	2	0
Other intangible assets, net of accumulated amortization of $316 and $307, respectively	316	307
Loans and Leases Receivable, Allowance	31	0
Other Noncurrent Assets, Allowance	$ 23	$ 0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, shares issued (in shares)	818,159,674	817,843,916
Common stock, shares outstanding (in shares)	665,131,148	663,952,656
Treasury stock, shares (in shares)	153,028,526	153,891,260
Variable Interest Entity [Line Items]
Non-recourse debt, including $5,817 and $3,872, respectively, related to variable interest entities	$ 15,536	$ 14,914
Non Recourse Debt Current	1,841	1,868
Consolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Non-recourse debt, including $5,817 and $3,872, respectively, related to variable interest entities	5,817	3,872
Non Recourse Debt Current	$ 420	$ 337