Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of computations of basic and diluted earnings per share

	Three Months Ended September 30,					Nine Months Ended September 30,
	2021		2020			2021		2020
	(in millions, except per share amounts)
Numerator:
Net income	$	1,031	$	(140)		$	2,059	$	1,357
Denominator:
Basic: Weighted-average common shares outstanding	116.4		123.0			118.2		124.8
Effect of potentially dilutive nonqualified stock options and other share-based awards	2.8		1.9			2.7		1.7
Diluted: Weighted-average common shares outstanding	119.2		124.9			120.9		126.5
Earnings per share:
Basic	$	8.86	$	(1.14)		$	17.42	$	10.87
Diluted	$	8.65	$	(1.14)	(1)	$	17.03	$	10.73

(1) Diluted shares used in this calculation represent basic shares due to the net loss. Using actual diluted shares would result in anti-dilution.