SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 26, 2020	Oct. 31, 2020	Dec. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Payments to Acquire Equity Securities				$ 275	$ 321
Forecast
Subsequent Event [Line Items]
Voluntary separation program costs			$ 45
Subsequent Event | Trupanion, Inc.
Subsequent Event [Line Items]
Equity Security Ownership Percentage	9.00%
Payments to Acquire Equity Securities	$ 60
Agreement to Purchase Common Stock	$ 200
U.S. | Pension Plan
Subsequent Event [Line Items]
Employer contributions				$ 0
U.S. | Pension Plan | Subsequent Event
Subsequent Event [Line Items]
Employer contributions		$ 100