Business Segments (Corporate Items) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Expenses:
Amortization expense of acquired intangible assets	$ 121	$ 122	$ 243	$ 243
Merger and strategic initiatives expense	5	20	9	44
Restructuring charges	14	9	24	15
Total expenses	540	484	1,036	939
Operating loss	712	568	1,369	1,115
Corporate
Revenues:
Divestitures of businesses	0	16	8	32
Expenses:
Amortization expense of acquired intangible assets	121	122	243	243
Merger and strategic initiatives expense	5	20	9	44
Restructuring charges	14	9	24	15
Legal and regulatory matters	6	1	12	4
Gain on extinguishment of debt			0	(19)
Expenses - divestitures	3	13	8	24
Other	1	1	1	1
Total expenses	150	166	297	312
Operating loss	$ (150)	$ (150)	$ (289)	$ (280)