Business Acquisitions - Transactions (Details) $ / shares in Units, $ in Millions				1 Months Ended
	Oct. 30, 2020 USD ($) $ / shares shares	Jul. 01, 2020 USD ($) shares	May 31, 2018 USD ($) shares	Apr. 30, 2019 USD ($)
Livongo Health
Business acquisition
Merger, conversion of common shares ratio	0.5920
Merger, conversion price (in dollars per share) | $ / shares	$ 4.24
Merger, special cash dividend | $ / shares	$ 7.09
Consideration paid	$ 13,938.0
Cash paid for acquisition	401.0
Amount related to conversion feature of the Livongo Notes guaranteed by the Company	$ 555.4
Equity consideration (in shares) | shares	60,400,000
Equity consideration	$ 12,981.6
Acquisition related costs	$ 59.0
InTouch
Business acquisition
Consideration paid		$ 1,069.8
Cash paid for acquisition		$ 166.5
Equity consideration (in shares) | shares		4,600,000
Equity consideration		$ 903.3
Acquisition related costs		$ 21.4
MedecinDirect
Business acquisition
Consideration paid				$ 11.2
Advance Medical
Business acquisition
Consideration paid			$ 351.7
Cash paid for acquisition			$ 283.1
Equity consideration (in shares) | shares			1,344,387
Equity consideration			$ 68.6
Acquisition related costs			$ 5.8