Goodwill and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Segment

Below is a summary of the changes in the carrying amount of goodwill by segment for the years ended December 31, 2016 and 2015:

In millions	Pharmacy Services			Retail/LTC			Total
Balance, December 31, 2014	$	21,234		$	6,908		$	28,142
Acquisitions	452			9,554			10,006
Foreign currency translation adjustments	—			(40		)	(40		)
Other (1)	(1		)	(1		)	(2		)
Balance, December 31, 2015	21,685			16,421			38,106
Acquisitions	—			126			126
Foreign currency translation adjustments	—			17			17
Other (1)	(48		)	48			—
Balance, December 31, 2016	$	21,637		$	16,612		$	38,249

(1) “Other” represents immaterial purchase accounting adjustments for acquisitions.

Anticipated Annual Amortization for Intangible Assets

The anticipated annual amortization expense for these intangible assets for the next five years is as follows:

In millions
2017	$	780
2018	748
2019	704
2020	534
2021	473

Summary of the Company's intangible assets

The following table is a summary of the Company’s intangible assets as of December 31:

	2016							2015
In millions	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Trademark (indefinitely-lived)	$	6,398	$	—		$	6,398	$	6,398	$	—		$	6,398
Customer contracts and relationships     and covenants not to compete	11,485		(4,802		)	6,683		10,594		(4,092		)	6,502
Favorable leases and other	1,123		(693		)	430		1,595		(617		)	978
	$	19,006	$	(5,495	)	$	13,511	$	18,587	$	(4,709	)	$	13,878