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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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ACQUISITIONS AND DIVESTITURES (Detail) $ in Millions							7 Months Ended	12 Months Ended
ACQUISITIONS AND DIVESTITURES (Detail) $ in Millions	Aug. 09, 2018 USD ($)	Aug. 08, 2018 USD ($)	Jul. 11, 2018 USD ($) location State	Jul. 02, 2018 USD ($)	Apr. 10, 2018 USD ($)	Mar. 01, 2018 USD ($)	Aug. 08, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire equity method investments								$ 1,095	$ 0	$ 0
Equity method investment in Kindred at Home								1,047	0
Disposal group, not discontinued operation, gain (loss) on disposal								786	0	0
Acquisitions								616	9
MCCI Holdings LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire businesses, gross						$ 169
Acquisitions						483
Finite-lived intangible assets acquired						80
Business combination, recognized identifiable assets acquired and liabilities assumed, tangible assets						$ 24
Acquired finite-lived intangible assets, weighted average useful life						8 years
Family Physicians Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire businesses, gross					$ 185
Acquisitions					133
Finite-lived intangible assets acquired					38
Business combination, recognized identifiable assets acquired and liabilities assumed, tangible assets					$ 14
Acquired finite-lived intangible assets, weighted average useful life					5 years
MCCI Holdings LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes receivable, related parties						$ 383
Put Option \| Equity Option
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, purchase price allocation, financial asset				$ 236
Call Option \| Equity Option
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, purchase price allocation, financial liability				$ 291
Other long-term assets \| Put Option \| Equity Option
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Financial assets, fair value disclosure								224
Other Noncurrent Liabilities \| Call Option \| Equity Option
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Financial liabilities fair value disclosure								$ 246
Disposed of by Sale \| KMG America Corporation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Parent company cash contributed to sale of subsidiary	$ 805
Disposal group, including discontinued operation, statutory capital	160
Disposal group, not discontinued operation, gain (loss) on disposal	786
Disposal group, not discontinued operation, tax expense (benefit) on disposal	(452)
Revenues							$ 182		261	249
Net income (loss)							$ 47		$ (117)	$ (336)
Disposed of by Sale \| Other Noncurrent Liabilities \| Call Option \| Equity Option \| KMG America Corporation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Parent company cash contributed to sale of subsidiary	$ 190
Kanawah Insurance Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments for reinsurance		$ 245
Kindred At Home
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage			40.00%	40.00%
Payments to acquire equity method investments				$ 850
Equity method investment in Kindred at Home				$ 1,000
Curo Health Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage			40.00%					40.00%
Payments to acquire equity method investments			$ 250
Equity method investment, number of locations \| location			245
Equity method investment, number of states \| State			22