Accounting Policies and Supplemental Disclosures (Tables)

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Supplemental Cash Flow Information

The following table shows supplemental cash flow information (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,				Twelve Months Ended June 30,
	2020		2021		2020		2021		2020		2021
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest on debt	$	139	$	179	$	430	$	455	$	872	$	942
Cash paid for operating leases	1,086		1,577		2,115		3,217		3,929		5,577
Cash paid for interest on finance leases	161		129		329		286		662		569
Cash paid for interest on financing obligations	21		35		43		68		77		127
Cash paid for income taxes, net of refunds	486		1,803		791		2,604		1,221		3,526
Assets acquired under operating leases	3,347		5,578		5,755		9,114		10,530		19,576
Property and equipment acquired under finance leases	3,155		1,642		5,321		3,709		13,110		9,976
Property and equipment acquired under build-to-suit arrangements	482		1,094		861		1,981		1,504		3,387

Calculation of Diluted Shares

The following table shows the calculation of diluted shares (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2020	2021	2020	2021
Shares used in computation of basic earnings per share	500	505	499	505
Total dilutive effect of outstanding stock awards	9	9	9	9
Shares used in computation of diluted earnings per share	509	514	508	514

Other Income (Expense), Net

Other income (expense), net, is as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2021		2020		2021
Marketable equity securities valuation gains (losses)	$	235	$	157	$	204	$	81
Equity warrant valuation gains (losses)	418		939		266		1,244
Upward adjustments relating to equity investments in private companies	—		31		—		1,506
Foreign currency gains (losses)	13		110		(209)		79
Other, net	(20)		24		(21)		48
Total other income (expense), net	646		1,261		240		2,958